Brake mechanism.



L. A. HOERR. BRAKE MEcHANlsM.

APPLICATION FILED AUGJI. I9l4.

l,149,579. K Patented Aug. 10, 1915.

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LOUIS A. HOEBR, OF ST. LOUIS, MISSOURI.

BRAKE MECHANISM.

Y Specication of Letters Patent.

Application filed August 17, 1911i. Serial No. 857,054.

T0 all lwhom it may concern Be it known that I, Louis A. Homin, a

citizen of the United States of America, re-

siding at the city of St. Louis, State of Missouri, have invented acertain new anduseful Brake Mechanism, ot' which the following is such afull, clear, and enact descrip tion as willenable any one skilled in theart towhich itappertains to make and use the same, reference being hadto the accompa nying drawings, forming part of this specification. i

My invention relates to brake mechanism for railway cars and, moreparticularly, to simple and ellicient means for 'securing the ratchetwheel of the brake mechanism to the brake stai.

The objectof my invention is to provide va simple and strongconstruction which will positively prevent the key from working out ofthe key-way and which will also eiiectively hold the wheel againstlongitudinal movement on 4the shaft.

In the accompanying drawings, which illustrate a brake mechanism made inaccordance with my invention, Figure 1 is a view of a portion of the endoi' a railway car on a reduced scale; Fig. 2 is a section taken on theline 2 2 of' Fig. 1; Fig. 3 is a front elevation of the parte shown inFig. 2, the parts being in their normal position; Fig. 4 is a viewsimilar to Fig. 3, butJ showing the brake stati raised to allow theinsertion or removal oi' the key; and Fig. 5 is across section of' thebrake stati showing a slight modification.

Like marks of reference refer to similar parte in the several views ofthe drawings.

10 is a railway car and 11'the brake stall supplied with the usual. handwheel 12. The brake stati 11 is held in position on the car 10 by meansof the lower brake `staff step 13, the upper brake stal? step 14C andthe brake stati bearing 15. All of these parts may be of any old andwell known construction.

Carried on the upper brake stad step 14 is abearing plate 16 providedwith a boss 17 through whichk the brake sta 1l passes. This boss 17 alsoserves to support the ratchet wheel 18. The plate 16 is also providedwith a stud 2 0 on which is mounted a pawl or dog 21 which cooperateswith the ratchet wheel 18. This pawl 21 is provided with an integralplate 22 projecting beneath l the ratchet wheel 18 so :.,s' ro preventthe pawl frpm being accidentally displaced.' The wheel 18 is itself heldagainst longitudinal' movement in a manner which will hereafter bedescribed.

The hub of the ratchet wheel 18 is provided with an opening 25 throughwhich Patenten aug. io, isis.

the brake stati 11 passes. A. key-way 26 is f formed in one side of thisopening. The brake staff 11 also has formed in it a keyway. This key-waymay be of any suitable form. In Figs. 1 to 11, I have shown it as anopening 27 of rectangular cross section, while in the modification shownin Fig. 5, it consists of a flattened portion 28.

29 is a key which is adapted to project 'partly into the key-way 27 or28 and partly into the key-way 26 in the hub of the wheel 18, thuspreventing relative rotation between the two parts. Formed integralfwiththe key 29 is a collar 30 surrounding the brake shaft 11. This collar 30is made somewhat elongated in one direction so as to allow the collar tobe slipped down over the brake staff 11. After it has reached theposition shown in Fig. 4, the staff may be loweredinto the positionshown in Fig. 3, the collar 30 forming an abutment bearing on the hub ofthe wheel 18 and thus holding the wheel against longitudinal movement.As the upper end of the key 29 is engaged by the end of the key-way 27,the key is eliectively locked against longitudinal movement by the statiitself. The stall is prevented from beL ing moved upwardly by means of alocking ring 3l passing through' the lower end of the stall, as shown inFig. 1. 'Even though this ring 31 should become disengaged from thestati', the weight of the stati' itself, which .is usually about fortypounds, will be suiiicient to hold the parts in normal position by meansof 4 gravity alone. The key 29 is shown as projecting some distanceabove the collar 30. This construction-is used where elongated key-waysare-formed in the staif. In oase the invention is applied to a new brakemechanism, it will not be necessary to have the key project above thecollar as the key-way may be -made correspondingly shorter so as toengage the upper end of the key and lock it against longitudinalmovement. lVhen it is desired to place the key in position or remove'it,it is only necessary to remove the ring Sl'and draw the staff up intothe position shown in Fig. 4.

It will be evident that lwhile my construction is very simple, iteffectively locks the key in position, thus not only preventing ,anylongitudinal movement of the-ratchet 'Wheel 18 on the shaft, butpositively pie l venting the Wheel from becoming detached from the shaftso as to rotate relatively thereto.

Having fully described my invention,

.what l claim as new and desire to secure by said Wheel to prevent itsupward movement,

said key being locked by the stati' from disengagement with the way inthe Wheel when the parts are normal.

2. The combination With a brake staff, oi a ratchet wheel provided withan opening for the passage of the stati and with a key Way at one sideof said opening, a key-way formed. in said staff, a key projecting intoboth ot said' key-ways, and. a collar carried bv said key andsurrounding the stati', said collar being' adapted to engage with `the1ghe/el to preveiiit its upward movement', said key boing locked by thest-ait from disensagement n'ith the way in said Wheel when are in normalposition. She coi'i'ibination with a brake stati', oii :i ratenet wheelprovided with an opening,r for the pass-.ige of the stati' and with akeyvvajv et one side of said opening, a key-Way formed in said etait", akey projecting into both Ways, and an abutment carried by' said lienl"id adapted to engage with said wheel to prevent nywerd. movement, saidkey miams,

`collar being adapted to engagevvith said wheel to prevent its upward.movement, said Vkey projecting above said collar and having its upperend engaged by the end of the Way in the statiA to p ent disengagementof the key from rva'y in the Wheel when the parts are in normalposition.

5. The con'ibination With a brake stal", of a ratchet Wheei providedwith an opening' for the passage oi the staff and with a keyway at oneside n? said opening, a key-Way formed in said st; a key projecting intoboth of said ways, at abutment carried by said key and adapted to engagewith the Wheel to prevent its upward movement, and e paivl 'for s: idivhceb said pawl having a portion proj ting below said wheel to preventthe upward movement of the paivl, said key being iocked by the stafffrom disengagement -frmn the Way in said wheel when the parts are innorn'ial position.

in testimony whereof, I have hereunto set my hand and aiiixed my seal inthe presence of tivo subscribing witnesses. Y

LOUS, A.. HOERR. [11. s] Witnesses W. A. ALEXANDER, G. M. Snonn.

